Concentration Problem Sets Do the following problems in your lab notebook. Be sure to specify the knowns & unknowns‚ the formulas used‚ show your work with labeled units and round you’re answers to the appropriate significant figures. 15-1 Molarity Problems: (M = moles/ liter ) 1. What is the molar concentration of a 415 ml solution containing 0.745 moles of HCl? (A: 1.80 M HCl) 2. What is the molar concentration of an acetic acid (CH3COOH) solution containing 3.21 moles in 4.50
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Name: Raj Bose Date: 23/1/2015 Partners: Sunniva & Bayu Determining the concentration of glucose of 7UP Glucose solutions prepared as follows:- In each case 250.0 cm3 volumetric flasks used Concentration (%) Mass/g 4.00 10.00 8.00 20.00 12.0 30.00 16.0 40.00 20.0 50.00 Table: 1- Recording of concentration‚ volume‚ and qualitative observations of various solute/solvent/solution used during the experiment. Name Concentration (%) Volume (ml) Qualitative Observations Glucose (C6H12O6) 5 different types:
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BUFFERS By: Luis P. Bazan‚ RPh.‚ Ph.D. A buffer solution is a solution of: 1. A weak acid or a weak base and 2. The salt of the weak acid or weak base Both must be present! A buffer solution has the ability to resist changes in pH upon the addition of small amounts of either acid or base. Consider an equal molar mixture of CH3COOH and CH3COONa CH3COOH (aq) H+ (aq) + CH3COO- (aq) Adding more acid creates a shift left IF enough acetate ions are present 16.3 Which of the following
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The members in our group were Whitney‚ myself‚ and Charlotte. The title of this lab was “reaction types.” The purpose of this lab was to identify the reaction type‚ balance equations‚ and observe the reactions .Our hypothesis was if there was many stations with fire‚ then they’re would be many combustion reactions. The procedure of the first lab was to place a solid piece of magnesium metal in the bottom of the smallest tube. Place this test tube in the test tube holder. Using tongs pick up the
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Worksheet - Acids‚ Bases and Salts 1. I am pure water. When heated my pH (increases‚ decreases)‚ because more of my water molecules dissociate. 2. I am a 0.020 M solution of weak acid‚ HA. If I only dissociate to the extent of 1.50%‚ what is the value of my Ka? 3. I am a 0.20 M solution of hydrocyanic acid‚ HCN‚ with a Ka of 4.93 x 10¯ 10 . What is my pH? 4. I am a buffer made from 0.10 M acetic acid and 0.15 M sodium acetate. If the Ka for acetic acid is 1.77 x 10¯ 5 ‚ what is my pH? 5. I am
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yellowish color Precipitated a very light bluish color Conclusion: The purpose of this experiment is to work with aqueous solutions of ionic substances. Aqueous solutions are those solutions in which water is the solvent. When ionic substances are dissolved in water‚ the ions separate and become surrounded by water molecules. The focus of this experiment is on precipitates. The goal of this experiment is to study the nature of ionic reactions‚ write balanced equations‚ and to write net ionic
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The worst thing about the Holocaust was the concentration camps‚ and the propaganda that was made to be used against the Jews. The concentration camps were brutal and the Nazis treated the prisoners inhumanly and with no respect. There were four different types of camps during The Holocaust; Concentration Camps‚ Transit Camps‚ Work/Labor Camps‚ and Extermination Camps. Although they were not useful all of the camps had their own purpose. The Concentration camps are a place where people are kept or
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Question: What is the effect of calcium in different concentrations on lima bean growth? Personal Engagement: For my internal assessment‚ I chose calcium because it interested me how adding a certain nutrient or element‚ can aid in growth of an organism. Calcium is a vital nutrient needed by most organisms and can be found in many things we consume like milk. Knowing that calcium helps keep humans healthy and have stronger bones‚ I wanted to experiment how calcium might aid in the growth of lima
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Testing the effect of concentration on rate of reaction Plan: We are investigating the effect of nitric acid on calcium carbonate. We are doing this experiment‚ as we would like to understand the effect that acid rain has on limestone. We also want to understand how acid can have an effect on rate of reaction. The word equation for the reaction that will take place is: Calcium Carbonate + Nitric Acid Calcium Nitrate + Carbon Dioxide + Water The balanced symbol equation
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Archive Banking Market Concentration and Credit Availability to Small Businesses Park‚ Yongjin Connecticut College March 2008 Online at http://mpra.ub.uni-muenchen.de/9265/ MPRA Paper No. 9265‚ posted 22. June 2008 / 05:46 Banking Market Concentration and Credit Availability to Small Businesses JEL Classification: G21 Keywords: Bank Competition‚ Indebtedness‚ Small Business‚ Relationship Banking ABSTRACT This paper examines how banking market concentration affects small businesses
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